Water-wheel



(No Model.)

R. N. DAVIDSON.

WATER WHEEL.

No. 253,267. Patented Feb. 7,1882.

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NrrE STATES PATENT OFFICE.

ROYAL N. DAVIDSOI OF VVEAVERVILLE, CALIFORNIA.

WATER-WH EEL.

SPECIFICATION forming part of Letters Patent No. 253,267, dated February7, 1882.

Application filed September 2, 1881.

To all whom it may concern Be it known that 1, ROYAL N. DAVIDSON, ofWeaverville, county of Trinity, State of California. have invented anImproved ater- Wheel; and I hereby declare the following to be a full,clear, and exact description thereof.

My invention relates to that class of waterwheels which is operated bythe forcible discharge of a stream of water upon the buckets or flangesin the rim of the wheel, and are commonly known as turbine water-wheels.

It consists in certain details ofconstructiomas hereinafter describedand specifically claimed.

Referring to'the accompanying drawings, Figures 1 and 2 are perspectiveviews of my wheel. Fig. 3 is a vertical section.

Let A represent one side of a wheel having a central axis, B, aboutwhich it revolves. The side A is convexcd to its center in conical form.On the front side of A are the flanges or buckets C. These are hollowedor dished out at the periphery of the wheel, and are curved inwardtoward the center, gradually tapering, as shown. Their inner ends aretherefore much narrower than their outer ends, the buckets being made toconform on one side to the convexity of the side A, and on the otherside being made straight. Upon their outer or straight sides is secureda rim, D, forming the other side of the wheel. This rim has an openingin the center, so that it really amounts to a ring or band inclosing theouter or dish-shaped ends of the buckets, while leaving the inner endsexposed for the discharge of the water. The apex of the side A is aboutin the same plane with the rim D, so that the water-spaces formed by thebuckets are contracted toward the center both in width and depth.

The wheel isintended to be properlymounted, either vertically orhorizontally, and the stream of water directed upon each successiveflange or bucket at a point in said bucket near its outer end. The forceof the stream revolves (No model.)

the wheel. When the stream first strikes the bucket its velocity is muchgreater than that ference toward the center, at which point the velocityof the wheel is less than at the circumference, and the diminishedvelocity of the stream will not therefore act as a drag upon therevolution. Because of the curvature of the buckets a further force isgenerated by conducting the water to the center.

It will be seen that this is a central-discharge wheel. The force of thestream is directed against the buckets and against the conical side ofthe wheel. After expending its force it isconductcd toward the center,and because of the conical side A is discharged out of line with thepower stream, and thus does not interfere with it, nor does the contentsof one bucket interfere with another.

Having thus described my invention," what I claim as new, and desire tosecure by Letters Patent, is

A water-wheel consisting of the convex or conical side A, having acentral axis, B, the tapering buckets or flanges O, secured upon theconvex side and curved and tapering toward the center of the side A, andthe rim or side D, with its open center, substantially as and for thepurpose herein described.

In witness whereof I have hereunto set my hand.

R. N. DAVIDSON.

Witnesses S. H. N OURSE, WM. F. Boo'rrr.

